Determination of 5 Elements in Zirconium Alloy by Inductively Coupled Plasma Atomic Emission Spectrometry
A method for the determination of Sn,Nb,Fe,Cr and Ni in zirconium alloy by inductively coupled plasma atomic emission spectrometry was proposed.The sample(0.1 g)was taken,and 5 mL of water,5 mL of nitric acid and 0.5 mL of hydrofluoric acid were added.After heating at 100℃for 5 min,the volume of the mixed solution was made up to 25 mL with water.The response intensities of 5 elements at Sn 242.949 nm,Nb 309.418 nm,Fe 259.941 nm,Ni 221.648 nm and Cr 267.716 nm were determined with the radio frequency power of 1 300 W,the atomizing gas flow rate of 0.80 L·min-1,and the sample injection amount of 2.0 mL·min-1,and the matrix matching method was used for quantification.It was shown that linear relationships between mass concentration and response intensity were kept within 150 μg·mL-1 for Sn and Nb,and 15 μg·mL-1 for Fe,Cr and Ni,and the detection limit(3s)of Sn was 16 μg·g-1,and the detection limits(3s)of other elements were lower than 3.0 μg·g-1.RSD(n=10)for the method reproducibility of each element was less than 2.0%,and the spiked recoveries were in the range of 99.0%-109%.Zirconium alloy standard substance SRM360b was used for verification,and the determined values were within the uncertainty ranges of the confirmed values.
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